잠란상(蠶卵上)의 반문(斑紋)의 유전(遺傳)에 대(對)하여 (2)

1962~1963년에 걸쳐서 농촌진흥청 잠업시험장에 보존되어 있는 잠품종중 4품종에 대하여 란문의 유전현상을 조사한 결과는 다음과 같다. 1) 정역교배의 어느 경우라도 F1은 모체의 난문수와 그 형태를 닮는다. 2) F2에서는 언제나 열성인 강성반문이 나타난다. 3) F3에 이르러 비로써 3:1로 분리한다. 4) F1의 난문은 수정전인 모체의 일부에 의하여 나타난 결과이므로 모성유전과는 달리 위모성유전을 한다. This work was carried out to know the hereditary phenomenon of the egg markings with 4 races preserved at Sericultural Experiment Station from 1962 to 1963. The results are as follows: 1. When crosses (Fig. 1) were made between females showing reticulate egg marks and males showing collected egg markings, the F1 markings were all reticulate. From the reciprocal cross was made between the collected marking females and the reticulate marking males (Fig. 2), all the F1 progeny showed the collected egg markings. 2. In the F2 the expected phenotype for reticulate markings (recessive) was not expressed but the collected markings (dominance) were always appeared. 3. When each F2 moth was inbred, the usual 3:1 ratio was obtained. 4. The F1 egg markings as well as the spindle shape egg were not determined by its own genes but by the genes of its mother, because those were formed before fertilization. The results of such influences, when they can be identified, are called material effects. And such a phenomenon was called pseudomaternal inheritance by Tanaka. (1919)